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Rocky Marciano The only world heavyweight boxing champion to retire undefeated, his 49 victories featured 43 knockouts and … | Boxing champions, Boxer, Sports hero
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![ESPN Ringside on Twitter: "If @Tyson_Fury retires, he would be the second heavyweight champion in history to retire undefeated, after Rocky Marciano 🤯 Fury: 32-0-1, 23 KO Marciano: 49-0, 43 KO https://t.co/Z1PuGZYJOB" / Twitter ESPN Ringside on Twitter: "If @Tyson_Fury retires, he would be the second heavyweight champion in history to retire undefeated, after Rocky Marciano 🤯 Fury: 32-0-1, 23 KO Marciano: 49-0, 43 KO https://t.co/Z1PuGZYJOB" / Twitter](https://pbs.twimg.com/media/FRHwCRaXsAAMuz5.jpg:large)
ESPN Ringside on Twitter: "If @Tyson_Fury retires, he would be the second heavyweight champion in history to retire undefeated, after Rocky Marciano 🤯 Fury: 32-0-1, 23 KO Marciano: 49-0, 43 KO https://t.co/Z1PuGZYJOB" / Twitter
Sports Heroes Who Served: Undefeated Boxing Champ Served in World War II > U.S. Department of Defense > Story
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Frank Sanchez, the emerging Cuban heavyweight force, stayed unbeaten by outpointing Christian Hammer | Boxing News | Sky Sports
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Max Boxing - Sub Lead - Undefeated heavyweight Agit Kabayel signs promotional contract with Top Rank
![On This Day - Apr 27 1956: Rocky Marciano retires as undefeated heavyweight boxing champion of the world - The Irish News On This Day - Apr 27 1956: Rocky Marciano retires as undefeated heavyweight boxing champion of the world - The Irish News](https://www.irishnews.com/picturesarchive/irishnews/irishnews/2017/03/16/124221900-eada2b95-0e15-4c59-8bf1-4458d9990ecf.jpg)
On This Day - Apr 27 1956: Rocky Marciano retires as undefeated heavyweight boxing champion of the world - The Irish News
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Ranking the 10 Most Accomplished Heavyweight Champions in Boxing History | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
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Sports Heroes Who Served: Undefeated Boxing Champ Served in World War II > U.S. Department of Defense > Story
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